Method for making a seamless plastic motion discomfort receptacle

ABSTRACT

A plastic motion sickness receptacle is disclosed having a seamless perimeter defined by a tubular member folded at a first closed end, and an open end including means for closing the receptacle after use. The plastic tubular member comprises integrally formed walls that terminate in a base at said closed end with the edges of the walls cooperating to form a fluid-tight relationship. An outer surface of the receptacle may include indicia printed thereon including instructions for using the bag upon the occurrence of motion sickness.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application is a divisional of Application No. 11/063,058 filedFeb. 22, 2005, which is a continuation of Application No. 10/423,427filed Apr. 25, 2003 now U.S. Pat. No. 7,041,042 issued on May 09, 2006,the entire contents of which are incorporated by reference herein.

FIELD OF INVENTION

The present invention relates generally to travel accommodations, andmore particularly to a travel sickness receptacle of seamlessconstruction formed of plastic to resist leakage and seepage.

DESCRIPTION OF RELATED ART

Many people are afflicted with a temporary malady that is brought uponby uneven motion, commonly known as motion sickness. While motionsickness can be brought about by many types of motion it is especiallycommon in airplanes and ships. Motion sickness results for many peoplewhen they experience accelerations in multiple directions as one mightencounter in a plane or rolling ship, and can be made worse if theindividual cannot view the horizon for reference. The balance functionof the inner ear under these conditions can send conflicting messages tothe brain in comparison with visual signals of the interior of a plane'sor ship's travel compartment. That is, the visual surrounding that theindividual perceives may not coincide with the rocking and rollingmotion the individual perceives through its balancing center at theinner ear. This conflict can lead to the traditional symptoms ofdizziness, fatigue, sweating, and nausea which may progress to vomiting.

As much as one third to one half of airline passengers experience motionsickness under conditions of heavy turbulence, and one would expectsimilar ratios for inclement sea travel as well. Because heavy airturbulence and high seas are a regular feature of airline and shiptravel, virtually every commercial airplane and passenger ship isequipped with receptacles commonly referred to as motion sickness bags.These paper bags are provided to passengers so that, upon the onset ofnausea, the passengers may have some place to evacuate their stomachcontents should the nausea progress to vomiting. These paper bags aretypically located in seat pockets and can be used while the passengersare in their seat-belted positions one would expect during heavyturbulence. The bags can be very reassuring to the passengers, knowingthat if the passenger should become ill, a potentially embarrassingsituation can be avoided by discretely using the motion sickness bagwithout having to stand-up and walk to a restroom, which couldexacerbate the condition.

While motion sickness bags satisfy an obvious need in the travelindustry, their design has remained unchanged for the better part offifty years or so. The bags are constructed of a folded heavy paper andmay be lined on its interior with some finish to resist leakage orseepage of its contents. However, paper bags are formed from a flatsheet and comprise longitudinal creases or seams that can permit fluidto eventually leak and seep into the crevasses and create problems suchas staining and emit odors. The containment of odors is especiallyimportant, since there are those that are moved to motion sickness bythe odor of another's sickness. This can lead to a chain reaction thatis unfortunately very common in severe travel conditions. And as withthe smell of another's sickness, motion sickness can be accelerated orbrought on by the sound of another traveler experience vomiting. Paperbags do little in the way of sound suppression to prevent others fromperceiving a fellow travelers unpleasantness, often times leading toother passengers experiencing motion sickness.

SUMMARY OF THE INVENTION

The present invention overcomes the shortcomings of the prior art inproviding a seamless motion sickness receptacle formed of a copolymerplastic material shaped without any longitudinal seams or crevassesthrough which fluids may seep or leak. The plastic receptacle ispreferably extruded in its open configuration to provide a leak-proofvessel that is continuous and seamless circumferentially along its innersurface and is resilient to resist rupture after sealing in the event ofpressure fluctuations. A first preferred embodiment comprises areceptacle made from a copolymer comprising ethylene and propylene thatis heated to approximately 200° C. and then extruded into its finalshape at a pressure of 450 Bar. The resultant receptacle isapproximately four to five millimeters thick and is opaque, pliable, andresilient. Another consequence of using a thicker plastic material isthat sound is suppressed to a greater extent, benefiting surroundingpassengers who may become ill at the sound of another passenger'sillness.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an elevated perspective view of a preferred embodiment of thepresent invention;

FIG. 2 is a bottom view of the embodiment of FIG. 1; and

FIG. 3 is a step diagram of the method for making the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 illustrates a first preferred embodiment of a motion sicknessreceptacle 100 of the present invention having a generally open-endedcolumnar structure comprising a base 110, a front wall 115, a rear wall120, and two side walls 125 with a crease 130 in the side walls 125 anda crease 135 in the front wall for collapsing the receptacle into aplanar configuration prior to use. The four walls are integrally formedwithout a seam such that there is a continuous and uniform constructionthroughout and across the four walls. That is, the receptacle 100 iscreated as a tubular construction rather than a folded sheet, and thusthere are no seams extending longitudinally along the receptacle'swalls. Each wall is formed of a common uninterrupted thickness, and thethickness of the base 110 may preferably be consistent with thethickness of the four walls.

Closure means is preferably provided along an outer surface of at leastone of the front and rear walls 115,120 along an upper edge. Closuremeans may comprise a twist-tie member (not shown) adhesively secured tothe outer wall that allows the upper portion of the receptacle to befolded closed and secured using the flexible twist-tie member.Alternatively, an adhesive strip 140 may be included along the outersurface for securing a first folded edge of the receptacle 100 to anopposite folded edge in a closed and folded configuration therebypreventing the receptacle from unfolding and opening inadvertently.Other closure means exist in the art such as interlocking groove and tabmembers on the interior of opposing walls (such as those found onpopular plastic sandwich bags), an envelope type overlapping adhesiveconfiguration, and many others that may be employed without deviatingfrom the scope of the present invention.

The receptacle 100 of the present invention preferably is formed of acopolymer material comprising ethylene and propylene. Pellets of theplastics are melted into a working composite mixture at about twohundred degrees Celsius, along with some additive agents for coloringpurposes. This heated molten compound is placed in a die where anextrusion process forms an open-ended tubular receptacle as the compoundflows into the gaps between the extruding member and the die. Theextrusion process may take place at a controlled pressure of 450 Bar.This process creates an open-ended tubular member with a seamlessperimeter that is not present in paper bags formed from flat sheets.After the extruded tubular member is formed, folds and creases thatconvert the tubular member into a rectangular shaped collapsibleparallelepiped that folds into a flattened configuration are formed.This step is preferably done in an automated setting wherein a machineis utilized to create the folds and creases. The bottom of thereceptacle (FIG. 2) is closed and sealed with a heat-press at an edge172 of the tubular member to ensure that there can be no leakage throughthe bottom of the receptacle.

In the final step, the tubular member is subjected to a printing step inwhich printing 150 is applied on an outer surface or surfaces to includeinstructions on its use in the event of motion sickness, as well aspossibly identifying the manufacture or the customer, present orderinginformation, or the like. The printing 150 is preferably carried out bya Gravure process whereby engraved plates or cylinders include aninverse image of the final indicia, and the plates or cylinders areinked and brought in contact with the outer surface of the tubularmember to leave a remnant impression. This process permits high-speedprinting of many units rapidly before each individual tubular member isformed into a receptacle.

The tubular member of the extruded copolymer plastic composition isformed into a bag-shaped receptacle by a sheet folding machine thatfolds a bottom end 110 of the tubular member into a closed configurationusing either a heat-applying press or adhesively clamping the bottomedges of the plastic walls. The thus-closed end cooperates with theseamless integral wall configuration to prevent the contents of thereceptacle from exiting through the junctures at the bottom and sides ofthe receptacle 100. The uninterrupted and uniform thickness of the walls115, 120, 125 are approximately four to five millimeters thick, and thisthickness provides adequate strength and coverage in the event of weakspots or unexpected thinning of the receptacle while preserving theflexibility and resiliency of the receptacle necessary to fold and stackthe articles in confined spaces. The thicker, plastic walls and base 110also suppress sound to a greater extent than the paper devices, thusaiding in minimizing the unpleasant and embarrassing nature oneexperiences socially when experiencing motion sickness.

The finished receptacle 100 is preferably four and one half to fiveinches tall and two and one half inches wide with a three inch bottomgusset in the open or inflated configuration. The tolerances on thethickness is approximately five percent. The receptacle can preferablybe folded along vertical creases, and along traverse creases adjacentthe base, to contract into a flat, compact pocket-size configurationprior to use. The resultant volume of the bag is more than adequate toaccommodate the severest of motion sickness bouts.

In use, the motion sickness receptacle is removed from its storagelocation upon the initial onset of nausea and opened from its folded,compact configuration. Holding the receptacle to one's mouth, vomitusmay be expelled into the receptacle discretely as sound is suppressed bythe plastic material. Risk of leakage or seepage is effectivelyminimized or eliminated by the use of a seamless construction around theperimeter of the receptacle and the impervious character of the plasticmaterial in comparison with the absorbent nature of paper products.After the receptacle has been used, a closure means as described aboveis implemented to close the contents therein until such time as thereceptacle can be properly disposed.

FIG. 3 illustrates the steps for manufacturing a preferred embodiment ofthe present invention. Step 200 represents the acquisition of thevarious copolymer constituents used to make the present invention. Uponacquiring the constituents, step 210 corresponds to the mixing andheating of the constituents into a workable composition that can beformed in an extrusion process. The extruding process and cooling step(step 220) follows, where the composition is formed into a tubularmember with a seamless, uniform perimeter. In step 230, the tubularmember is folded and creased using a sheet folding machine into arectangular configuration with creases that cause the tubular member tofold into a bag-shaped configuration. In addition, the bottom end of thereceptacle is sealed closed using heat or adhesive to form a fluid-tightseal to prevent leakage through the bottom of the receptacle. After thereceptacle has been formed and cooled, the final step 240 calls for theprinting of various graphics and information, including instruction, onthe outside of the receptacle. The final printing step is preferablyaccomplished with a Gravure process that allows rapid printing of manyreceptacles.

The description above is illustrative only, and is intended to providethe inventor's best mode of making and using the invention. However, itwill be apparent to one of ordinary skill in the art that the presentinvention can be practiced outside of the present description. Thus, thedisclosure should be viewed as illustrative only, with the scope of theinvention limited only by the language of the claims presented below

1. A method for making a motion sickness receptacle comprising the stepsof: providing a copolymer composition of first and second plastics;heating said copolymer composition to 200 degree C.; extruding thecopolymer composition into a seamless tubular member; applying creasesin the tubular member to create a rectangular parallelepiped; sealing afirst end of said tubular member into a fluid-tight relationship byheat-pressing opposed edges of said tubular member; providing closuremeans adjacent a second end of said tubular member.